Method dieselExhaust1AnimationUpdate

src/OpenLoco/src/Vehicles/VehicleBody.cpp:1089–1156

0x004AB9DD & 0x004AAFFA

    // 0x004AB9DD & 0x004AAFFA
    void VehicleBody::dieselExhaust1AnimationUpdate(const Vehicle& train, const CarUpdateState& carState, uint8_t num, int32_t emitterHorizontalPos)
    {
        VehicleBogie* frontBogie = carState.frontBogie;
        VehicleBogie* backBogie = carState.backBogie;
        if (frontBogie->hasBreakdownFlags(BreakdownFlags::brokenDown))
        {
            return;
        }

        VehicleHead* headVeh = train.head;
        Vehicle2* veh_2 = train.veh2;
        const auto* vehicleObject = getObject();

        if (headVeh->vehicleType == VehicleType::ship)
        {
            if (veh_2->currentSpeed == 0.0_mph)
            {
                return;
            }

            if (has38Flags(Flags38::isReversed))
            {
                emitterHorizontalPos = -emitterHorizontalPos;
            }

            if (ScenarioManager::getScenarioTicks() & 3)
            {
                return;
            }

            auto positionFactor = vehicleObject->bodySprites[0].halfLength * emitterHorizontalPos / 256;
            auto invertedDirection = spriteYaw ^ (1 << 5);
            auto xyFactor = Math::Trigonometry::computeXYVector(positionFactor, invertedDirection) / 2;

            World::Pos3 loc = position + World::Pos3(xyFactor.x, xyFactor.y, vehicleObject->animation[num].emitterVerticalPos);
            Exhaust::create(loc, vehicleObject->animation[num].objectId);
        }
        else
        {
            if (veh_2->motorState != MotorState::accelerating)
            {
                return;
            }

            if (has38Flags(Flags38::isReversed))
            {
                emitterHorizontalPos = -emitterHorizontalPos;
            }

            if (ScenarioManager::getScenarioTicks() & 3)
            {
                return;
            }

            if (wheelSlipping != 0)
            {
                return;
            }